Improvement in spring-mattresses



1. JOHNSTON.

Spring-Mattresses.

N0.155,586 J Patented Oct. 6,1874,

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THE GRAPHIC CO-PHOTU-LITHJSi 4 PARK PLAcE' UNITED STATES PATENT OrrrenHN JoHNsToN, on NEW YORK, N. Y.

IMPROVEMENT IN SPRlNG-MATTRESSES.

Specification forming part of Letters Patent No. 155,586, dated October6, 1874; application filed August 22, 1874.

To all whom it may concern:

Be it known that I, JOHN J oHNsToN, of the city, county, and State ofNew York, have invented certain Improvements in Spring-Mattresses, ofwhich the following is a specification:

My invention relates to spring-mattresses; and consists in a novelconstruction, combination, and arrangement of parts, which have fortheir object to provide a means whereby the springs are supported andsecured in the mattress, so as to lessen the possibility of their beingdisplaced, or of their bulging or bagging in their centers, whensubjected to pressure, aswill be fully hereafter explained and setforth.

Figure 1 is a vertical transverse section of a spring-mattress embodyingmy improvements. Fig. 2 is a horizontal section through the line 00 as,Fig. 1. Fig. 3 is an elevation of the former, on which the springs arecoiled. Figs. 4 and 5 represent a blank, in different stages ofconstruction, from which the clasp is formed. Fig. 6 is a plan view,illustrating the manner of securing the strips of webbing together bythe clasps, (shown in Figs. 4 and 5.) Fig. 7 is a transverse of Fig. 6;and Fig. 8 is a detail view, showing the manner of securing the clasp tothe spring.

The spring A is formed as seen in Fig. 3, and at its middle point, or,in other words, at the apexes of the two cones forming the spring, it iswound into a'compact helical coil, B, of comparatively small diameter,which coil constitutes a stiff screw-like cylinder, by which. the springis secured to the clasp O, in the manner shown in Fig. 8, and hereafterdescribed. The webbing a is secured together at the points ofintersection by the metal clasps 0, Figs. 4, 5, 6, and 7, in the mannershown in Figs. 6 and 7. This clasp consists of a square blank, the fourcorners of which are out out at right angles, as shown in Fig. 4. Thetwo opposite edges or sides a a are then turned up at right angles to'the blank, while the other two, a afiare turned down likewise at rightangles, as shown in Fig. 5.

thus being at right angles, and the ends of the clasp are then turnedover them, thus firmly securing them together. A hole, I), for thepassage of the spring-wire is then made in or about the middle of theblank, and one end of the wire of the spring being inserted in this holethe spring is turned into it until the helical coil arrives at theclasp. This coil is then screwed into the clasp O, as seen in Fig.8,where it is firmly retained by its stiffness and solidity. The cords cc, in Fig. 1, show the method of attaching the Outer springs, next theframe, to it. Such springs, when placed in a mattress, are corded. inthe usual way, and have a border of rattan, or other light frame,running all around and attached to the outer and largest coil of all thesprings next the frame, on both ends of the springs alike, formin g aborder on each side of the mattress, and is usually called a doublespring-border mattress.

The upper half of Fig. 1 shows that such mattresses are usuallyupholstered, which is true of either side.

By my invention a greater security of action is effected, because of thevertical and relative position in which the springs are held, and in theintersection of the webbing in a mattress without the necessity ofstitches or loops of twine, as are usually adopted, and which are soonloosened by use or vibration. It also secures cheapness and lightness,by the use of less wire in the spring, and durability because of thefirmness and solidity of the central coil B in holding the spring inposition by its own independent action.

I claim- The spring A, in combination with the webbing a and clasp O, asdescribed, the spring being s'ecured in the clasp in the manner setforth.

JOHN JOHNSTON. Witnesses:

JAMES V. SoHENcK, T. H. BUNAS.

